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Grabbing data

Hi,

If i have two tables, one to hold categories and one to hold articles set up like this :

Cats
======
CatdID
CatTitle
Order

Articles
======
AID
Category
Title
Article
Date

What is the most efficient way to print out each category followed by the title of all the articles that belong to that category. It can easily done by having one while loop inside another, but is there a more efficient way?